**Forecast models from sources like the Finnish Meteorological Institute and global ensembles indicate a maximum temperature near 13°C in Helsinki on September 23, driven by persistent northerly flow advecting cooler maritime air under mostly cloudy skies with scattered showers.** This setup aligns with the seasonal decline in insolation and typical late-September climatology, where average highs fall to around 14°C. Recent model runs show limited spread, with precipitation timing and cloud cover as key variables that could nudge the daily peak slightly lower or allow brief clearing toward 14°C. Trader consensus reflects this tight range, weighted toward the 12–14°C outcomes amid stable high-pressure influence to the north. Updated guidance ahead of the date will refine resolution criteria based on official station observations.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Helsinki on September 23?
Highest temperature in Helsinki on September 23?
13°C 39%
14°C 24%
12°C 21%
11°C 12%
NEW
NEW
Sep 23, 2026
7°C or below
2%
8°C
2%
9°C
3%
10°C
4%
11°C
12%
12°C
21%
13°C
39%
14°C
24%
15°C
11%
16°C
5%
17°C or higher
1%
13°C 39%
14°C 24%
12°C 21%
11°C 12%
NEW
NEW
Sep 23, 2026
7°C or below
$27 Vol.
2%
8°C
$5 Vol.
2%
9°C
$13 Vol.
3%
10°C
$0 Vol.
4%
11°C
$69 Vol.
12%
12°C
$5 Vol.
21%
13°C
$338 Vol.
39%
14°C
$17 Vol.
24%
15°C
$28 Vol.
11%
16°C
$23 Vol.
5%
17°C or higher
$116 Vol.
1%
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Helsinki Vantaa Airport Station in degrees Celsius on 23 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.**Forecast models from sources like the Finnish Meteorological Institute and global ensembles indicate a maximum temperature near 13°C in Helsinki on September 23, driven by persistent northerly flow advecting cooler maritime air under mostly cloudy skies with scattered showers.** This setup aligns with the seasonal decline in insolation and typical late-September climatology, where average highs fall to around 14°C. Recent model runs show limited spread, with precipitation timing and cloud cover as key variables that could nudge the daily peak slightly lower or allow brief clearing toward 14°C. Trader consensus reflects this tight range, weighted toward the 12–14°C outcomes amid stable high-pressure influence to the north. Updated guidance ahead of the date will refine resolution criteria based on official station observations.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Helsinki Vantaa Airport Station in degrees Celsius on 23 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Market Opened: Sep 21, 2026, 12:58 AM ET
Volume
$640End Date
Sep 23, 2026Market Opened
Sep 21, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Helsinki Vantaa Airport Station in degrees Celsius on 23 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.**Forecast models from sources like the Finnish Meteorological Institute and global ensembles indicate a maximum temperature near 13°C in Helsinki on September 23, driven by persistent northerly flow advecting cooler maritime air under mostly cloudy skies with scattered showers.** This setup aligns with the seasonal decline in insolation and typical late-September climatology, where average highs fall to around 14°C. Recent model runs show limited spread, with precipitation timing and cloud cover as key variables that could nudge the daily peak slightly lower or allow brief clearing toward 14°C. Trader consensus reflects this tight range, weighted toward the 12–14°C outcomes amid stable high-pressure influence to the north. Updated guidance ahead of the date will refine resolution criteria based on official station observations.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Helsinki Vantaa Airport Station in degrees Celsius on 23 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Volume
$640End Date
Sep 23, 2026Market Opened
Sep 21, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...**Forecast models from sources like the Finnish Meteorological Institute and global ensembles indicate a maximum temperature near 13°C in Helsinki on September 23, driven by persistent northerly flow advecting cooler maritime air under mostly cloudy skies with scattered showers.** This setup aligns with the seasonal decline in insolation and typical late-September climatology, where average highs fall to around 14°C. Recent model runs show limited spread, with precipitation timing and cloud cover as key variables that could nudge the daily peak slightly lower or allow brief clearing toward 14°C. Trader consensus reflects this tight range, weighted toward the 12–14°C outcomes amid stable high-pressure influence to the north. Updated guidance ahead of the date will refine resolution criteria based on official station observations.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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